Guard for woodworking machines



W. F. DUNLEY.

GUARD FOR WOODWORKING MACHiNES. APPLICANON FILED max/11,1920.

l S/cgQggia atented Oct. 3, w22..

/w Y Mii M /f jimi u /z i, M Y u Patented @et d, i922..

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enlazan `non 'wwaonwonsti-rte` Meantime.

application sied May 1i,

To all whom, t may concern.'

Be it known that l, iii/naman F. Donner, a citizen of the United States, residing at Binghamton, in the county of Broome and State of New York, have invented certain new and useful improvements in Guards for llfoodworking li'iachines, of which the following is a specification.

This invention relates to safety devices for planers and other wood-working machines which are intended to prevent injury to operatives by reason of the violent displacement or throwing from the machines of the material being operated upon by rapidly revolving cutters, saws or the like.

lThe object of the invention is to provide a device of the kind referred to which shall be so constructed as to adapt it for attachment to machines of different widths; and a further object is to provide such a device in which the principal operative parts may all simultaneously be moved into position for use, or out of operative position; for instance, when the article to be operated upon is introduced into a machine.

Having the above mentioned objects in view, the invention consists of a safety guard for wood-working machines, having the novel generic and specific features of construction and arrangement of the parts substantially as hereinafter described and claimed.

@ne form of embodiment of the invention is illustrated in the accompanying drawing.

In this drawing Figure l is an end view of the feed end of a planing machine showing my invention arranged thereto, the parts of the device being shown in operative position.

Figure 2 is an end view partly in section, showing in full lines the device in operative position and by dotted lines in inoperative position.

Figure 3 is a detail perspective view of the means employed for moving the principal operative parts of the device into and out of their normal positions; and

Figure d is a detail view of the form of shaft employed.

ln the drawing l represents a portion of the frame of a planing machine, and 2 represents the feed roller thereof.

Arranged beneath the roller is a work table 3, whichmay be vertically adjusted in 1920. serial no. 330,464.

any suitable way, as is usual in machines of this character.

Mounted on the inner faces of the frame l, above the work table, for instance, in bearings lin plates t, which are secured to the frame, isa shaft 5 on which are loosely 60 mounted a series of dogs 6. The dogs are arranged to abut against each other and are of a number to extend entirely across the work table 3. j

ln order that the shaft 5 may be capable 65 of attachment to machines of different widths, it is of a form adapting it to be quickly and easily lengthened or shortened. For instance, it may be composed of a hollow member 7, and of a second member 8, which may be either hollow or solid, and which is of a size to enter and be closely confined by the hollow member and be capable of moving longitudinally therein. r`Ehe outer ends of the respective members of the shaft are preferably secured in sockets in the plates by set-screws 9 or in some equivalent manner.

Extending across the machine adjacent to and a short distance above the shaft 5 is a bar l0, which is preferably composed of telescoping parts corresponding to the shaft 5 in order that it may readily be lengthened or shortened, in order that it, like the shaft 5, may be adapted for ready attachment to machines of dierent widths. The outer ends of the bar may be mounted in sockets in the outer portions of the plates 4 and secured the-rein by set-screws l1, as shown.

The dogs 6 which constitute the principal operative parts of the device are, in the form herein shown, each composed of a body l2 having an opening therethrough for the reception of the shaft 5, and from which eX- tends a normally downwardly extending projection 13 having a curved face 14; and terminating in a pointed end. ln order to give suflicient weight to insure moving the projection 13 into operative position and maintaining it there under ordinary working conditions, preferably form with such projection a protuberance l5. The weight of the protruberance serves both to depress the dog and keep the latter in operative position, and to hold the dog when the latter is up out of operative position and is sustained by the rod 10 against accidental displacement. The face of each dog opposite to that on which the protubcrance is located is formed with a lip 16 adapted to abut against the lower face of the rod 10 when the projection 13 of the dog is in a downward position.

When work is to be introduced into the machine the dogs are swung upward and are supported upon the bar 10. As each dog is capable of swinging on the shaft 5 independently of the others, in order that the device may be capable of use on material of different thicknesses, it is necessary to provide means for moving all the dogs up out of operative position by one operation. To this end a rod 17, attached to and free to swing on the shaft 5, extends across the rear faces of the dogs. The rod 17 has formed in each end thereofan eye 18 offset from the rod and receiving the shaft, and extending from the rod is a projection 19-constituting a handle by means of which the rod may be swung. When the dogs are to be moved out of working position the handle is swung upward and rearward, causing the bar to carry the dogs upward until they fall by their own weight upon the sustaining bar 10.

insonne In the use of the device the points of the projections rest upon the material carried by the work table, to be operated upon at a point inward from the shaft 5, and any tendency to move the material rearward in the operation of a cutter or saw is instantly checked, as the dogs, being in contact with the work, are moved rearward, causing them to arrest and bind the work to the work table.

I claim:

1. A device of the kind described comprising a plurality of freely swinging dogs, an extensible shaft on which the dogs are mounted, and means for mounting the shaft above a work table.

2. A device of the kind described comprising a plurality of freely swinging dogs, an extensible shaft on which the dogs are mounted, and means for mounting the shaft above a work table consisting of plates having sockets therein for receiving the ends of the shaft, and means for securing the shaft in the sockets.

In testimony whereof I aiiix my signature.

WILLIAM F. DONLLEY. 

